import java.util.*;
/**
 * Created by ScorpionOrange on 2016/10/28.
 */
public class SetTest {
    public static void main(String[] args){
        Set<String> words = new HashSet<>(); // HashSet implements Set
        long totalTime = 0;

        Scanner in = new Scanner(System.in);
        while (in.hasNext()){
            String word = in.next();
            long callTime = System.currentTimeMillis();
            words.add(word);
            callTime = System.currentTimeMillis() - callTime;
            totalTime += callTime;
        }

        Iterator<String> iter = words.iterator();
        for(int i = 1; i <= 20 && iter.hasNext(); i++){
            System.out.println(iter.next());
        }
        System.out.println(". . .");
        System.out.println(words.size() + " distinct words. " + totalTime + "milliseconds.");
    }
}
